Spring damping truck



' Jan. il?, 1933. E. w. WEBB SPRING DAMPING TRUCK- Filed Feb. 13, 1952'2 Sheets-Sheet 1 `Fan. 17, 1933. E. w. WEBB 1,894,385 1 SPRING DAMPINGTRUCK Filed Feb. 13, 1952 ZSheets-Sheet 2 Patented Jan. 17, 1933 UNITEDSTATES PATENT OFI-lcs EDWIN WEBB, OF CHICAGO, ILLINOIS, ASSIGNOR TSTANDARD CAB TRUCK COM- PANY, OF CHICAGO, ILLINOIS, A CORPORATION 0F NEWJERSEY SPRING DAMPING TRUCK Application #led February 13, 1932. Serial No. 592,722..

This invention relates to spring damping means for car trucks.

This application is one of a group of three applications direct'ed\ tospring damplng .5 means for car trucks. M apphcation Serial Number592,720, filed simultaneously herewith and entitled Lateral motionsprlng damping car truck is one of this group of three applications,while my appllcatlon for Patent Serial Number 592,721, also filedsimultaneously with this application and -entitled Spring damping cartruck7 is a second application of this group. The present 1nventionembodies the inventions disclosed 1 n the above identilied applicationsin their broader aspects, but diers considerably from said aboveidentified inventions in its more specific aspects.

Generally stated, it is the obJect of the 1nvention to provide a noveland improved spring damping car truck having certain advantages in itsconstructlon over those disclosed in my prior above identifiedappllcations for patent.

To this end, generally stated, the invention consists in the novel partsand novel combinations of parts hereinafter defined in the claims anddescribed in the following specification, made in connection with theaccompanying drawings wherein like reference characters refer to thesame or similar parts throughout the various views and in which,

Fig. 1 is a view partly in side elevation and partly in verticallong1tudinal section taken through portions of a car truck wherein thepresent invention is embodied;

Fig. 2 is a horizontal sectional view taken substantially on the line2-2 of Fig. l, as indicated by the arrows;

Fig. 3 is a vertical sectional view taken substantially on the line 3-3of Fig. 1, as indicated by the arrows, the truck bolster being shownchieiiy in side elevation;

Fig. 4 is a vertical longitudinal section taken substantially on theline 4 4 of Fig. 5

through a pair of co-acting wedges;

Fig. 5 is a view in end elevation of the same wedges; and

Fig. 6 is a wedges.

bottom view of the co-acting Bussum .interconnected by vertical crosswebs 13 and the side webs 12, together with the vertical webs 13,l formthe bolster columns of the side frame. The inner surface of each crossweb 13 is lined by a wear plate 14 secured to web 13 as by means ofrivets 15. At the sides of the bolster opening 8 and adjacent the bottomof the same, short horizontal webs 16 are yprovided which interconnectthe side webs l2 and form spring seats. The side frame 7 forms an archbar 17 of channel-shape in vertical cross section, which traverses theupper portion of the bolster opening 8.

A combination roller seat and chafing member 18 has a bottom 18a whichrests upon the upper ends of the bolster springs 11. Laterally spacedroller contours 18b are formed on the upper surface of bottom 18a andsupported within these contours are lateral Inotion rollers 19 which fitwithin laterallr vspaced roller contours9a formed on the bei.- tomsurface of the end of bolster 9. The end of the bolster 9 is accordinglysupported for lateral motion transversely of the truck and relative tothe side frame 7 by the rollers 19 resting on the combination seat andchating member 18, which is, in turn, supported by the bolster springs11. The chaing member 18 has vertical sides 180 of'channel-shape inhorizontal cross section, as best shown in Fig. 2, and thesechannelsare'closed at their upper ends by means of cross webs 18d. Theupper ends of the sides 180 are interconnected by a top 18e whichtraverses the end of the bolster 9 and is preferably of channel- 'shapein vertical cross section.

normal position of the lower surface of the bottom 18a of chafng member18. A pair of cooperating wedges 21 and 22 respectively are interposedbetween each side 180 of the chaiing member and wear plate 14 facing thesame and these wedges rest on and are supported by one of the springs20. The wedges 21 have horizontal bottom surfaces against which theupper ends of the springs 20 bear and arcuate lugs 21a projectdownwardly from the bottom surfaces of these wedges 21 to partly.encompass the upper ends of the springs 20. Wedges 21 may be designatedouter wedges in contra-distinc tion to the wedges 22 which may bedesignated inner wedges. The outer wedges 21 have diagonally inclinedinner surfaces which project from adjacent the bottoms of the wedgesupwardly and outwardly toward the outer surfaces of the wedges 21, whilethe inner wedges 22 have outer inclined surfaces which engage theinclined surfaces of the outer wedges 21. The inner wedges 22 arerecessed downwardly from' their upper surfaces adjacent their inneredges and the webs 18d of the chafing member 18 bear against therecessed surfaces of the inner wedges 22. It will bev seen that theinner portions of the inner wedges 22 are received within the channelsformed by the sides 180 of the chafing member 18 and, accordingly,lateral movement of the inner wedges 22 is impossible. The inner wedges22 have downwardly projecting triangular iianges 22a which are receivedwithin triangular- Shaped recesses 2lb formed in the sides of the outerwedges 21 and thus lateral movement of the outer wedges 21 relative tothe inner wedges 22 is impossible. Although the wedges 21 and 22 areillustrated in the drawings as being of solid formation, these wedgesmay be cored to lighten the same when they are cast if desired.

. Although in the drawings, but one end of the truck bolster 9 isillustrated and only one side frame structure is shown for supportingthis end of the bolster, it will be understood that the opposite end ofthe bolster `9 from the end shown in the drawings, will be supported bya side frame structure which is a duplicate of the structure illustratedand described.

When the car truck is in service, as the wheels of the truck run overhigh spots on the rails, the bolster springs 11 will be compressedthereby causing the end of the bolster 9 supported by the side frame 7,to lower somewhat relative to the side frame and thereby move chafingmember 18 downwardly somewhat relative to the bolster columns formed bythe side webs 12 and vertical cross webs 13. As the cross webs 18d ofthe chaf' mg member 18 rest on the inner wedges 22, wedges 22 and 21will tend to move with the chafing member 18. Springs 20 will resistLacasse downward movement of wedges 21 relative to the side frame 7 andas a result, inner wedges 22 will tend to. slide on outer wedges 21 tourge the wedges 22 into ti hter engagement with the-sides 18o of cha ngmemb/er 18 and to urge wedges 21 into tighter engagement `with wearplates 14. The fric.- tional engagement between the outer surfaces ofthe wedges 21- and the wear plates 14 will ofer resistance to thedownward movement of the chang member 18 andthe end of bolster 9relative to the side frame 7 and thus the compressive action of thebolster springs 11 will be damped. The i added resistance oii'ered bythe wedges 21 and 22 to the compressive movement of the springs 11increases tremendously as the forces tending to compress the springs 11are increased. In other words, as the springs 11 are increasinglycompressed, the added resistance offered ,to the compressive movement ofthe springs will'be much more than directly proportional to the increasein the forces tending to compress the springs. rlhe an le formed by theinclined surfaces of the we ges 21 and 22 with the vertical is such asto furnish maximum vfrictional resistance to sliding movement of wedges21 and 22 relative to wear plates 14 and vertical cross webs 13 withoutcausing sticking of the parts.

At all times the truck bolster 9 will have freedom for lateral motiontransversely of the` truck and relative to the side frame 7. The lateralmotion rollers supported on the combination roller seat and chafingmembers v 18 and, in turn, supporting the ends of the truck bolster 9make this lateral motion of the truck bolster possible.

It will be apparent that 1f it is desired to 'l eliminate. the lateralmotion feature of the present truck, this can easily be done bymodifying the construction slightly. The

words truck bolster structure, as used in the claims, are to beconstrued broadly enough to include any suitable bolster, such as anordinary bolster not equipped with the combination roller seat and changmember 18, and rollers 19, as well asa bolster construction includingsuch parts as bolster 9, combination roller seat and chafing members 18and rollers 19.

It will, of course, be understood that various changes may be made inthe form details arrangement and proportions of the various partswithout departing from the scope of the present invention.

vWhat is claimed is 1. In acar truck, side frames having bolsteropenings, a bolster structure having ends disposed within said bolsteropenings, bolster springs supporting the ends of said bolster structurefrom said side frames, pairs of oppositely disposed wedges interposedbetween the sides of said bolster structure and ort-ions of said sideframes, each end of sai bolster structure resting on one wedge of eachpair and springs interposed between theother wedges of each pair andportions of said side frames, said last mentioned springs urging saidwedges into tighterr wedging relation as said bolster springs areincreasingly compressed.

2. In a car truck, side frames having bolster openings, a truck bolsterstructure having ends disposed within said openings, bolster springs'supporting the ends of said bolstered structure from said side frames,inner and y outer oppositelyfacin and contactingwedges inte osed betweent e sides of the ends of said ol'ster structure and portions of saidside frame, said bolster structure resting on said inner wedges andvertically disposed springs reacting between said outer wedges and otherportions of said side frames, said p last mentioned springs urging saidwedges:

into tighter wedging relation as said bolster springs are increasinglycompressed.

3.- n a car truck, side frames having bolster openings, a truck bolsterstructure having ends disposed within said openings, bolster springssupporting the ends of said bolster structure from said side frames,said side frames having surfaces disposed in spacedparallel relationfromthe sides of said bolster structure, inner and outer oppositely facingand 'contacting wedges interposed between the sides of said bolsterstructure and said facin surfaces of said side frames, the ends of saidbolster structure resting on said inner wed es and vertically disposedsprings interposed besaid members resting on said inner wedgesl andsprin interposed between said outer wedges an portions of said sideframes and urging said wedging members into tighter wedging relation assaid bolster springs are increasingly complressed.

In testimonyA w ereof I aiiix my s' ature.

EDWIN W. BB.

tween said outerwedges and portions of said v side frames below thesame.

4. In a car truck, side frames having bolster openings, a truck bolsterstructure having ends disposed within said openings bolster springssupporting the ends of said bolster structure rom said side frames, saidside frames having surfaces spaced from the sides of the ends `of saidbolster structure, inner and outer oppositely facing and contactingwedges interposed between the sides of sai bolster structure and saidspaced surfaces, `said side' frames having spring supports below saidwedges and springs resting on said spring supports and bearing at theirupper ends against said outer wedges. v

5. In a car truck, side frames having bolster openings, spring sup ortsat the sides of said bo ster openings a jacent the lower endsthereof,'and vertical cross. webs spaced from said bolster openingsadjacent the upper ends thereof, a truck bolster structure having endsdisposed within said bolster openings, bolster springs su porting theends of said bolster structure rom said side frames, inner and outeroppositely facin and contacting wedges inter `osed between t e Asides ofthe ends of said lster structure and said vertical cross webs, saidbolster structure resting on said inner wedges and springs resting attheir ian lll

